<template>
  <div>
     <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type = "primary" @click="addDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>
      <el-table :data="rolelist" border stripe>
        <el-table-column type="expand">
          <template #default="{row}">
            <el-row :class = "['bdbottom',i1===0?'bdtop':'','vcenter']" v-for="(item1,i1) in row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span ="5">
                <el-tag closable @close="removeRightById(row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for嵌套渲染二级权限 -->
                 <el-row :class="[i2===0?'':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(row,item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(row,item3.id)">{{item3.authName}}</el-tag>
                  </el-col>
                 </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column><!--展开列-->
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template #default={row}>
            <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(row.id)">编辑</el-button>
            <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeUserById(row.id)">删除</el-button>
            <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 添加用户的 对话框 visible.sync控制对话框的显示隐藏boolean-->
    <el-dialog
      title="添加用户"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClose"
    >
      <!-- 内容主题区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="90px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addUser">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改用户信息对话框 -->
    <el-dialog
      title="修改用户信息"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <el-form
        :model="editForm"
        :rules="editFormRules"
        ref="editFormRef"
        label-width="90px"
      >
        <el-form-item label="角色名称">
          <el-input v-model="editForm.roleName" prop="roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部區域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editUserInfo"
          >确 定</el-button
        >
      </span>
    </el-dialog>

    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed">
      <!-- 树形控件 -->
     <el-tree
      :data="rightslist"
      :props="treeProps"
      show-checkbox
      node-key="id"
      default-expand-all
      :default-checked-keys="defKeys"
      ref = "treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default {
  data () {
    return {
      // 所有角色列表数据
      rolelist: [],
      // 控制添加用户对话框的显示与隐藏
      addDialogVisible: false,
      // 添加用户表单数据
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      // 添加表单验证规则
      addFormRules: {
        roleName: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 7, message: '长度在 3 到 7 个字符', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入用户描述', trigger: 'blur' }
        ]
      },
      // 修改用户对话框显示与隐藏
      editDialogVisible: false,
      // 查询到的用户信息对象
      editForm: {},
      // 修改表单的验证规则对象
      editFormRules: {
        roleName: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 7, message: '长度在 3 到 7 个字符', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入用户描述', trigger: 'blur' }
        ]
      },
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限
      rightslist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点id值数组
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: ''
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色数据
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      // console.log('res111', res)
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.rolelist = res.data
    },
    // 关闭清空输入框
    addDialogClose () {
      this.$refs.addFormRef.resetFields()
    },
    // 添加新用户
    addUser () {
      this.$refs.addFormRef.validate(async (valid) => {
        // 表单提交预校验
        // console.log(valid)
        if (!valid) {
          return false
        }
        // 可以发起添加用户的网络请求
        const { data: res } = await this.$http.post('roles', this.addForm)
        // console.log(res)
        if (res.meta.status !== 201) {
          return this.$message.error('添加用户失败！')
        }
        this.$message.success('添加用户成功！')
        // 隐藏添加用户的对话框
        this.addDialogVisible = false
        this.getRolesList()
      })
    },
    // 查询用户信息
    async showEditDialog (id) {
      const { data: res } = await this.$http.get(`roles/${id}`, { id: id })
      console.log('修改项的id', res)
      if (res.meta.status !== 200) {
        return this.$message.error('查询用户信息失败')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    // 修改用户信息
    editUserInfo () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) {
          return false
        }
        // 可以发起修改用户的网络请求
        const { data: res } = await this.$http.put(`roles/${this.editForm.roleId}`, {
          id: this.editForm.roleId,
          roleName: this.editForm.roleName,
          roleDesc: this.editForm.roleDesc
        })
        if (res.meta.status !== 200) {
          return this.$message.error('更新用户信息失败！')
        }
        // 提示修改成功
        this.$message.success('更新用户信息成功！')
        // 关闭对话框
        this.editDialogVisible = false
        this.editForm = res.data
        // 刷新列表
        this.getRolesList()
      })
    },
    async removeUserById (id) {
      // 询问用户是否删除
      const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // 如果用户确认删除返回值为confirm字符串,取消删除返回值为cancel
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      // console.log('确认删除')
      const { data: res } = await this.$http.delete(`roles/${id}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除用户失败')
      }
      this.$message.success('删除用户成功')
      this.getRolesList()
    },
    // 根据id删除对应的权限
    async removeRightById (role, rightId) {
      const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败')
      }
      this.$message.success('删除权限成功')
      // this.getRolesList()
      role.children = res.data
    },
    async showSetRightDialog (role) {
      this.roleId = role.id
      // 获取所有权限数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败')
      }
      this.rightslist = res.data
      console.log(role)
      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)

      this.setRightDialogVisible = true
    },
    // 通过递归的形式获取角色下所有三级权限的id，并保存到defKeys数组中
    getLeafKeys (node, arr) {
      if (!node.children) {
        // 如果当前node节点不包含children属性则是三级节点
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed () {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights () {
      const keys = [...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败')
      }
      this.$message.success('分配权限成功')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>
<style lang="less" scoped>
  .el-tag{
    margin:7px;
  }

  .bdtop{
    border-top: 1px solid #eee;
  }

  .bdbottom{
    border-bottom: 1px solid #eee;
  }

  .vcenter{
    display: flex;
    align-items: center;
  }
</style>
